import java.util.concurrent.Callable;
import java.util.concurrent.FutureTask;

public class Demo2 {





    public static void main(String[] args) {
        Callable<Integer> callable = new Callable<Integer>() {
            @Override
            public Integer call() throws Exception {
                int res = 0;
                for (int i = 0; i < 100; i++) {
                    res += i;
                }
                return res;
            }
        };

        FutureTask<Integer> futureTask  = new FutureTask<>(callable);
        Thread t = new Thread(futureTask);
        t.start();
        System.out.println("haha");
    }
}
